Dynamic and static separator

Abstract

The invention provides a dynamic and static separator, which relates to the field of mechanical structure design research and development, and comprises an outer cone, an inner cone, a blade cage, a top cover, two outlet circular plates and a coal return box. The inner cone is arranged in the outer cone, and the inner cone and the outer cone form a conical space. The blade cage is arranged on the inner cone and the outer cone and assembled in a rotating component, and the rotating component is used for driving the blade cage to rotate. And the top cover is arranged on the blade cage. The two outlet circular plates are arranged on the top cover, and the rotating component and the two outlet circular plates are assembled together. The coal return box is connected to the lower end of the outer cone. The coal returning box is further used for allowing an air-powder mixture to enter the dynamic and static separator, then the air-powder mixture passes through a conical space formed by the inner cone and the outer cone and then is subjected to first-time pulverized coal screening through the static blades, qualified pulverized coal and air pass through the blade cage to be subjected to second-time pulverized coal screening, and the air-powder mixture is subjected to second-time pulverized coal screening. And the screened pulverized coal leaves the dynamic and static separator along with wind.

Description

Technical Field

[0001] The present invention relates to the field of mechanical structure design and development, and in particular to a dynamic-static separator. Background Art

[0002] At present, the coal powder separation structure of the double-inlet and double-outlet ball mill is called a separator. Since anthracite has low volatility, the coal powder fineness required for boiler combustion is relatively fine, so the requirements for the separator are higher. The dynamic and static separator came into being under such conditions, and the dynamic and static separator is extended on the basis of the static separator. The specifications of the double-inlet and double-outlet ball mill dynamic and static separators that have been developed in the prior art are 2.4m, 2.6m, 2.9m and 3.2m respectively. These specifications also correspond to the corresponding static separators. The output of the existing coal mill is relatively small, only 30t / h. If the 4 developed dynamic and static separators are used, the required separation effect cannot be achieved. It is necessary to develop a new dynamic and static separator based on the output of this project. Summary of the invention

[0003] The object of the present invention is to provide a dynamic-static separator to solve the above problems.

[0004] In a first aspect, an embodiment of the present invention provides a dynamic-static separator, comprising:

[0005] outer cone;

[0006] An inner cone is disposed inside the outer cone, and the inner cone and the outer cone form a conical space;

[0007] A blade cage is arranged on the inner cone and the outer cone, and the blade cage is assembled in a rotating component, and the rotating component is used to drive the blade cage to rotate;

[0008] A top cover, arranged on the leaf cage;

[0009] Two outlet circular plates are arranged on the top cover, and the rotating component is assembled with the two outlet circular plates; and

[0010] A coal return box connected to the lower end of the outer cone;

[0011] The outer cone, the inner cone, the blade cage, the top cover and the two outlet circular plates together form a circulation space for the wind-powder mixture;

[0012] Among them, the coal return box is also used to supply the air-powder mixture to enter the dynamic-static separator. Then, after passing through the conical space composed of the inner cone and the outer cone, the air-powder mixture passes through static blades for the first coal powder screening, and the qualified coal powder and wind pass through the blade cage for the second coal powder screening. The screened coal powder then leaves the dynamic-static separator with the wind.

[0013] In some embodiments, the coal return box is a cylindrical structure.

[0014] In some embodiments, the leaf cage is in a circular ring structure, and the leaf cage has a plurality of blades.

[0015] In some embodiments, the leaf cage has a plurality of support bars radiating to the periphery.

[0016] In some embodiments, the two outlet circular plates have two symmetrically arranged through holes.

[0017] In some embodiments, the through hole is crescent-shaped. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram of the overall assembly structure of a dynamic and static separator provided in one embodiment of the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the structure of the inner cone of the dynamic and static separator;

[0021] Figure 3 for Figure 1 Schematic diagram of the structure of the outer cone of the dynamic and static separator;

[0022] Figure 4 for Figure 1 Structural diagram of the coal return box of the dynamic and static separator;

[0023] Figure 5 for Figure 1 Schematic diagram of the structure of the blade cage of the dynamic and static separator;

[0024] Figure 6 for Figure 1 Schematic diagram of the structure of the two outlet circular plates of the dynamic and static separator. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Please refer to Figures 1 to 6 The embodiment of the present invention provides a dynamic-static separator, comprising: an outer cone 5, an inner cone 4, a blade cage 3, a top cover 2, two outlet circular plates 1 and a coal return box 6.

[0032] The inner cone 4 is disposed inside the outer cone 5, and the inner cone 4 and the outer cone 5 form a conical space;

[0033] The blade cage 3 is arranged on the inner cone 4 and the outer cone 5, and the blade cage 3 is assembled in a rotating component, and the rotating component is used to drive the blade cage 3 to rotate;

[0034] The top cover 2 is arranged on the leaf cage 3;

[0035] Two outlet circular plates 1 are arranged on the top cover 2, and the rotating component is assembled with the two outlet circular plates 1; and

[0036] The coal return box 6 is connected to the lower end of the outer cone 5;

[0037] The outer cone 5, the inner cone 4, the leaf cage 3, the top cover 2 and the two outlet circular plates 1 together form a circulation space for the air-powder mixture;

[0038] The return coal box 6 is also used to supply the air-powder mixture to the inside of the dynamic-static separator. Then, after passing through the conical space composed of the inner cone 4 and the outer cone 5, the air-powder mixture is screened by the static blades for the first time. The qualified coal powder and wind are screened by the blade cage 3 for the second time. The screened coal powder then leaves the dynamic-static separator with the wind. In the design process of the 2.1m specification dynamic-static separator, the mechanism of the existing specification dynamic-static separator is analyzed first.

[0039] The flow rate of the 2.1m specification dynamic and static separator is the same as the flow rate of the existing 2.1m static separator. The shape design of the 2.1m dynamic and static separator is carried out by adjusting the outer cone, inner cone and other external dimensions of the existing 2.1m static separator, and then the flow rate that can flow and the flow rate of coal powder in the separator are calculated according to the designed external dimensions, and then compared with the corresponding data of the existing dynamic and static separator. By continuously adjusting the external dimensions of the outer cone, inner cone and blade cage, the final flow value, coal powder flow rate and other data are close to the calculated theoretical value.

[0040] The flow rate of the pulverized coal should be controlled, otherwise it will affect the separation effect of the separator. In this way, the outer and inner cones of the separator are roughly designed. At the same time, the flow value and the output value of the coal mill should be calculated to ensure that the resistance value of the separator is within a reasonable range, otherwise the resistance value is too large and will affect the powder delivery capacity.

[0041] After the external dimensions are determined, the internal design will be carried out. The internal design of the dynamic-static separator mainly involves two parts, namely the design of the blade cage and the transmission part. In order to reduce the design amount, and also considering that there is not much difference in appearance between 2.1m and 2.4m, and the transmission power and resistance are not much different, and the entire transmission design of 2.1m has a certain amount of margin, so the transmission device of 2.1m will directly use the design of the transmission device of 2.4m dynamic-static separator.

[0042] Due to the limitation of the size of the overall dynamic and static separator, the blade cage part needs to be redesigned. Different sizes of dynamic and static separators have different blade cage sizes, especially the diameter size of the blade cage. Under the same coal type and fineness requirements, in order to ensure that blade cages of different sizes have similar powder selection effects, it is necessary to ensure that the linear velocity of the outer circle of the blade cage is the same under a certain rotation speed, so as to ensure that the blade cage screens the coal powder at the same speed. When the motor power has been selected, the rotation speed of the blade cage can be determined. At the same time, according to the above analysis, the linear velocity of the outer circle of the blade cage is also known, so that the diameter size of the blade cage can be inferred and the blade cage can be designed in detail. After the size of the blade cage is determined and the drawing design is completed, the linear velocity of the outer circle of the blade cage can be checked again. After completing the above design, the overall design size, flow area, flow rate and flow rate of the separator can be verified.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dynamic and static separator, characterized in that: include: outer cone; An inner cone is disposed inside the outer cone, and the inner cone and the outer cone form a conical space; A blade cage is arranged on the inner cone and the outer cone, and the blade cage is assembled in a rotating component, and the rotating component is used to drive the blade cage to rotate; A top cover, arranged on the leaf cage; Two outlet circular plates are arranged on the top cover, and the rotating component is assembled with the two outlet circular plates; as well as A coal return box connected to the lower end of the outer cone; The outer cone, the inner cone, the blade cage, the top cover and the two outlet circular plates together form a circulation space for the wind-powder mixture; Among them, the coal return box is also used to supply the air-powder mixture to enter the dynamic-static separator. Then, after passing through the conical space composed of the inner cone and the outer cone, the air-powder mixture passes through static blades for the first coal powder screening, and the qualified coal powder and wind pass through the blade cage for the second coal powder screening. The screened coal powder then leaves the dynamic-static separator with the wind.

2. The dynamic-static separator according to claim 1, characterized in that: The coal return box is in a cylindrical structure.

3. The dynamic-static separator according to claim 1, characterized in that: The leaf cage is in a circular ring structure and has a plurality of fan blades.

4. The dynamic-static separator according to claim 3, characterized in that: The leaf cage is provided with a plurality of support bars radiating to the surroundings.

5. The dynamic-static separator according to claim 1, characterized in that: The two outlet circular plates have two symmetrically arranged through holes.

6. The dynamic-static separator according to claim 5, characterized in that: The through hole is crescent-shaped.

Images